#define MPH 1.15077945
#define MPS 0.51444444
#define KMH 1.852
#define MILES_PER_METER 0.00062137112
#define KM_PER_METER 0.001
#define CM 100
#define t6 100000

float ground_course;
long ground_speed;
unsigned long fix_age, speed, course;

struct Location {
  uint8_t  id;
  uint8_t  stg;
  int32_t  lat;
  int32_t  lon;
  int32_t  alt;
};
struct Location current_loc	= {0,0,0,0,0};

enum GPS_fix {
	NONE = 1,
	OLD = 2,
	fix_3D = 3
};

